EP0140977A4 - Magnetic head and method of manufacture thereof. - Google Patents

Magnetic head and method of manufacture thereof.

Info

Publication number
EP0140977A4
EP0140977A4 EP19840901409 EP84901409A EP0140977A4 EP 0140977 A4 EP0140977 A4 EP 0140977A4 EP 19840901409 EP19840901409 EP 19840901409 EP 84901409 A EP84901409 A EP 84901409A EP 0140977 A4 EP0140977 A4 EP 0140977A4
Authority
EP
European Patent Office
Prior art keywords
manufacture
magnetic head
magnetic
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19840901409
Other languages
German (de)
French (fr)
Other versions
EP0140977B1 (en
EP0140977A1 (en
Inventor
Noriyuki Kumasaka
Hideo Fujiwara
Shigekazu Tsutsujino Da Ohtomo
Takeo Hitachi Ohwada Yamashita
Noritoshi Hitachi Ohwada Saito
Mitsuhiro Kudo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0140977A1 publication Critical patent/EP0140977A1/en
Publication of EP0140977A4 publication Critical patent/EP0140977A4/en
Application granted granted Critical
Publication of EP0140977B1 publication Critical patent/EP0140977B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track
    • G11B5/2651—Manufacture
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track
    • G11B5/2652—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track with more than one gap simultaneously operative
    • G11B5/2654—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track with more than one gap simultaneously operative for recording or erasing
    • G11B5/2655—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track with more than one gap simultaneously operative for recording or erasing with all the gaps disposed within the track or "guard band" between tracks, e.g. with erase gaps operative on track edges, with wide erase gap followed by narrow write gap

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
EP84901409A 1983-04-04 1984-04-02 Magnetic head and method of manufacture thereof Expired - Lifetime EP0140977B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57816/83 1983-04-04
JP58057816A JPS59185015A (en) 1983-04-04 1983-04-04 Magnetic head and its manufacture

Publications (3)

Publication Number Publication Date
EP0140977A1 EP0140977A1 (en) 1985-05-15
EP0140977A4 true EP0140977A4 (en) 1986-09-24
EP0140977B1 EP0140977B1 (en) 1990-06-27

Family

ID=13066439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901409A Expired - Lifetime EP0140977B1 (en) 1983-04-04 1984-04-02 Magnetic head and method of manufacture thereof

Country Status (6)

Country Link
US (1) US4774616A (en)
EP (1) EP0140977B1 (en)
JP (1) JPS59185015A (en)
KR (1) KR920006124B1 (en)
DE (1) DE3482609D1 (en)
WO (1) WO1984003984A1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185015A (en) * 1983-04-04 1984-10-20 Hitachi Ltd Magnetic head and its manufacture
JPS60256904A (en) * 1984-06-01 1985-12-18 Hitachi Ltd Magnetic head
JPS61162813A (en) * 1985-01-14 1986-07-23 Hitachi Maxell Ltd Manufacture of compound magnetic head
JPS61184705A (en) * 1985-02-13 1986-08-18 Hitachi Ltd Magnetic head
JPS6220113A (en) * 1985-07-19 1987-01-28 Alps Electric Co Ltd Composite type magnetic head and its manufacture
JPH01128213A (en) * 1987-11-13 1989-05-19 Hitachi Ltd Metallic thin film magnetic head
US5170301A (en) * 1988-08-03 1992-12-08 Matsushita Electric Industrial Co., Ltd. Magnetic head having core parts joined by low-melting point crystallized glass with composite gap
DE3934284C2 (en) * 1988-10-13 1994-06-16 Canon Denshi Kk Magnetic head
US4984118A (en) * 1989-01-09 1991-01-08 Springer Technologies Flux-concentrating, non-ghosting electromagnetic read/write head
US5001589A (en) * 1989-05-31 1991-03-19 Seagate Technology, Inc. Tungsten and tantalum diffusion barriers for Metal-In-Gap magnetic heads
US5216559A (en) * 1990-06-01 1993-06-01 Iomega Corporation Carrier structure for read/write heads
US5122917A (en) * 1990-06-01 1992-06-16 Iomega Corporation Unitary read-write head array for magnetic media
JPH04143911A (en) * 1990-10-05 1992-05-18 Canon Electron Inc Magnetic head
US5315469A (en) * 1991-07-25 1994-05-24 Applied Magnetics Corporation Magnetic recording head which produces variable erase bands
US5452166A (en) * 1993-10-01 1995-09-19 Applied Magnetics Corporation Thin film magnetic recording head for minimizing undershoots and a method for manufacturing the same
JPH1091912A (en) * 1996-09-17 1998-04-10 Sony Corp Magnetic head
US20070047122A1 (en) * 2005-08-30 2007-03-01 International Business Machines Corporation Tape head having write devices and narrower read devices
US8191234B2 (en) * 2008-08-01 2012-06-05 International Business Machines Corporation Method of manufacturing a magnetic head with reinforcing islands

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846840A (en) * 1973-08-10 1974-11-05 Ibm Read/write and longitudinal edge erase head assembly having multiple similarly shaped layers
JPS5542302A (en) * 1978-09-14 1980-03-25 Mitsubishi Electric Corp Magnetic head
JPS56156920A (en) * 1980-04-30 1981-12-03 Toshiba Corp Composite magnetic head and its production
JPS56169214A (en) * 1980-06-02 1981-12-25 Nippon Hoso Kyokai <Nhk> Magnetic head
JPS5744219A (en) * 1980-08-27 1982-03-12 Sony Corp Magnetic head
US4425701A (en) * 1980-10-17 1984-01-17 Matsushita Electric Industrial Co., Ltd. Methods of making magnetic recording heads
JPS57179925A (en) * 1981-04-27 1982-11-05 Toshiba Corp Magnetic head
US4642719A (en) * 1982-02-18 1987-02-10 Hitachi Metals, Ltd. Magnetic head assembly
JPS58155513A (en) * 1982-03-10 1983-09-16 Hitachi Ltd Composite magnetic head and its manufacture
JPS598120A (en) * 1982-07-05 1984-01-17 Sharp Corp Production of magnetic head
JPS5924958A (en) * 1982-07-27 1984-02-08 Sumitomo Special Metals Co Ltd Accurate polishing method of insulating thin film
JPS5954024A (en) * 1982-09-22 1984-03-28 Hitachi Ltd Composite magnetic head and its production
JPS59142716A (en) * 1983-02-04 1984-08-16 Hitachi Ltd Magnetic head and its manufacture
JPS59185015A (en) * 1983-04-04 1984-10-20 Hitachi Ltd Magnetic head and its manufacture
JPH0539532A (en) * 1991-03-07 1993-02-19 Sumitomo Metal Ind Ltd Method for recovering cu on semiconductor wafer surface
JP3189168B2 (en) * 1991-07-17 2001-07-16 旭化成株式会社 Non-aqueous secondary battery with overdischarge resistance

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 116 (P-125)[994], 29th June 1982; & JP-A-57 044 219 (SONY K.K.) 12-03-1982 *
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 59 (P-110)[937], 16th April 1982; & JP-A-56 169 214 (NIPPON HOSO KYOKAI) 25-12-1981 *
PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 26 (P-172)[1171], 2nd February 1983; & JP-A-57 179 925 (TOKYO SHIBAURA DENKI K.K.) 05-11-1982 *
PATENTS ABSTRACTS OF JAPAN, vol. 8, no. 97 (P-272)[1534], 8th May 1984; & JP-A-59 008 120 (SHARP K.K.) 17-01-1984 (Cat. P,A) *
See also references of WO8403984A1 *

Also Published As

Publication number Publication date
WO1984003984A1 (en) 1984-10-11
JPS59185015A (en) 1984-10-20
DE3482609D1 (en) 1990-08-02
KR920006124B1 (en) 1992-07-27
KR840009160A (en) 1984-12-24
US4774616A (en) 1988-09-27
EP0140977B1 (en) 1990-06-27
EP0140977A1 (en) 1985-05-15

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